Bandwidth (Q)?

[Bruizer 10+ year member]

I have a Kicker SX1250.1 amp. However there is a setting which I have no clue what it affects. The amplifier has a setting called Bandwidth where you adjust the "Q" in .5 increments from .5 to 10. The only thing the manual tells me is that a lower "Q" effects frequencies closest to the center frequency while a higher "Q" does not effect them as much, but it doesn't tell me how it effects them. What does turning down the "Q" and turning up the "Q" do?

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[JimJ 5,000+ posts]

Sounds like a control for the bass boost...so for example, if you're boosting a certain frequency, turning the Q higher would narrow the range of frequencies boosted, while a lower Q value would provide a broader peak from center.

Since bass boost sucks anyway, I wouldn't use it.

 

[outspoken 10+ year member]

sorry to but in on this thread but is this q factor the same for hu eq's? on my pioneer i have a q factor adjustment for each band, is it the same idea?

 

[Bruizer 10+ year member]

Sounds like a control for the bass boost...so for example, if you're boosting a certain frequency, turning the Q higher would narrow the range of frequencies boosted, while a lower Q value would provide a broader peak from center.
Since bass boost sucks anyway, I wouldn't use it.

Thanks. I don't use my bass boost so I guess I should just leave the Q alone. I've read too many things on how bad bass boost is to ever even think of using it.

 

[squeak9798 5,000+ posts]

sorry to but in on this thread but is this q factor the same for hu eq's? on my pioneer i have a q factor adjustment for each band, is it the same idea?

Yes.

 

[thch 10+ year member]

the title is pretty close, Q = Bandwidth / CenterFrequency.

(center frequency is geometric, not arithmetic)

eg, a filter with a Q of 1, centered at 100hz, would mainly affect 61.8hz - 161.8hz. note that this is 100hz of bandwidth (1 * 100hz = Q * Fc), and that 100hz is the geometric mean (61.8 * 161.8 = 100 * 100). a Q of 10 would mean only 10hz around 100hz are primarily affected (95.1hz to 105.1hz)

since your HU has feasible Q values, the "Q" might actually refer to Q. Simpler HUs often have Q as a "1 2 or 3", where 1,2, and 3 are settings and not literal values for Q.

 

[BukvaMan 10+ year member]

how do u like ur amp and at what load are u using it? I love the SX amps from kicker and i have two of them aswell one is a sx900.4 and the other is sx600.2 wich i use for two 12" boston g5 and belive it or not with 275 rms each it gets very loud. But i could be pushing 450 to each according to boston not that i really need it louder but there might be times //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif. I was just wondering of the quality of a mono amp especially at 1ohm load and the lower damping factor how the subs sound... im very picky on SQ and dont like muddy bass but loud yes //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

thanx for your input

 

[Bruizer 10+ year member]

how do u like ur amp and at what load are u using it? I love the SX amps from kicker and i have two of them aswell one is a sx900.4 and the other is sx600.2 wich i use for two 12" boston g5 and belive it or not with 275 rms each it gets very loud. But i could be pushing 450 to each according to boston not that i really need it louder but there might be times //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif. I was just wondering of the quality of a mono amp especially at 1ohm load and the lower damping factor how the subs sound... im very picky on SQ and dont like muddy bass but loud yes //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
thanx for your input

I'm running the SX1250.1 at 1ohm to my 2 Polk SR124-DVC subwoofers. I love it. Very sturdy, powerful (mine came rated at 1410watts), looks great, and has a ton of features to play around with while at the same time being user friendly. I am really impressed with it. The SQ is amazing but the subs I bought were meant for SQ. My bass is nice and clean, not muddy at all. I'm still tinkering with it so I can get everything exactly the way I like it. Haven't done any exploring of the Kompressor feature so I'll probably play with that next. I don't think I could have picked a better amp.

 

[BukvaMan 10+ year member]

i have two boston acoustics G5 wich are very SQ oriented but hit very hard. I was just concert on the damping factor of the amp at 1ohm load but since u are saying the opposite i might just look into upgrading. and yea i really think its one of the best amps out there ...

 

[Bruizer 10+ year member]

i have two boston acoustics G5 wich are very SQ oriented but hit very hard. I was just concert on the damping factor of the amp at 1ohm load but since u are saying the opposite i might just look into upgrading. and yea i really think its one of the best amps out there ...

I got mine from onlinecarstereo.com and it seemed like a pretty good deal. I don't know how much longer they will be out though seeing as Kicker just removed the SX series off of there website as of today or yesterday.